How to align bottom of picture to ground when loading it?
Current import Images as Planes addon doesn't have this feature ... so before some pythonist comes to help ... Blender is bundled with Align Tools addon. If you import all Images as Planes you can use addon to adjust them at once ...
Search for Align Operator
(or go to side panel (N) &gt; Item &gt; Align Tools &gt; Advanced)

choose Object / X, Z / Min / Min it aligns all objects to left-bottom corner

then switch to Pivot / Active / Min to place Origin (Pivot point) also to left-bottom corner

Or use any other option ... to move all object to a World Origin (X0/Y0/Z0) press Alt+G